Commit | Line | Data |
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bfb2ec6a SM |
1 | /* |
2 | * Copyright (C) 2019 Simon Marchi <simon.marchi@efficios.com> | |
3 | * | |
4 | * SPDX-License-Identifier: LGPL-2.1-only | |
5 | * | |
6 | */ | |
7 | ||
8 | #include <assert.h> | |
9 | #include <common/error.h> | |
10 | #include <common/macros.h> | |
11 | #include <lttng/action/action-internal.h> | |
c2c58434 JR |
12 | #include <lttng/action/firing-policy-internal.h> |
13 | #include <lttng/action/firing-policy.h> | |
bfb2ec6a SM |
14 | #include <lttng/action/rotate-session-internal.h> |
15 | #include <lttng/action/rotate-session.h> | |
16 | ||
17 | #define IS_ROTATE_SESSION_ACTION(action) \ | |
17182cfd | 18 | (lttng_action_get_type(action) == LTTNG_ACTION_TYPE_ROTATE_SESSION) |
bfb2ec6a SM |
19 | |
20 | struct lttng_action_rotate_session { | |
21 | struct lttng_action parent; | |
22 | ||
23 | /* Owned by this. */ | |
24 | char *session_name; | |
c2c58434 | 25 | struct lttng_firing_policy *policy; |
bfb2ec6a SM |
26 | }; |
27 | ||
28 | struct lttng_action_rotate_session_comm { | |
29 | /* Includes the trailing \0. */ | |
30 | uint32_t session_name_len; | |
31 | ||
32 | /* | |
33 | * Variable data: | |
34 | * | |
35 | * - session name (null terminated) | |
c2c58434 | 36 | * - policy |
bfb2ec6a SM |
37 | */ |
38 | char data[]; | |
39 | } LTTNG_PACKED; | |
40 | ||
41 | static struct lttng_action_rotate_session *action_rotate_session_from_action( | |
42 | struct lttng_action *action) | |
43 | { | |
44 | assert(action); | |
45 | ||
46 | return container_of(action, struct lttng_action_rotate_session, parent); | |
47 | } | |
48 | ||
49 | static const struct lttng_action_rotate_session * | |
50 | action_rotate_session_from_action_const(const struct lttng_action *action) | |
51 | { | |
52 | assert(action); | |
53 | ||
54 | return container_of(action, struct lttng_action_rotate_session, parent); | |
55 | } | |
56 | ||
57 | static bool lttng_action_rotate_session_validate(struct lttng_action *action) | |
58 | { | |
59 | bool valid; | |
60 | struct lttng_action_rotate_session *action_rotate_session; | |
61 | ||
62 | if (!action) { | |
63 | valid = false; | |
64 | goto end; | |
65 | } | |
66 | ||
67 | action_rotate_session = action_rotate_session_from_action(action); | |
68 | ||
69 | /* A non-empty session name is mandatory. */ | |
70 | if (!action_rotate_session->session_name || | |
71 | strlen(action_rotate_session->session_name) == 0) { | |
72 | valid = false; | |
73 | goto end; | |
74 | } | |
75 | ||
76 | valid = true; | |
77 | end: | |
78 | return valid; | |
79 | } | |
80 | ||
81 | static bool lttng_action_rotate_session_is_equal( | |
82 | const struct lttng_action *_a, const struct lttng_action *_b) | |
83 | { | |
84 | bool is_equal = false; | |
85 | const struct lttng_action_rotate_session *a, *b; | |
86 | ||
87 | a = action_rotate_session_from_action_const(_a); | |
88 | b = action_rotate_session_from_action_const(_b); | |
89 | ||
90 | /* Action is not valid if this is not true. */ | |
91 | assert(a->session_name); | |
92 | assert(b->session_name); | |
93 | if (strcmp(a->session_name, b->session_name)) { | |
94 | goto end; | |
95 | } | |
96 | ||
c2c58434 | 97 | is_equal = lttng_firing_policy_is_equal(a->policy, b->policy); |
bfb2ec6a SM |
98 | end: |
99 | return is_equal; | |
100 | } | |
101 | static int lttng_action_rotate_session_serialize( | |
c0a66c84 | 102 | struct lttng_action *action, struct lttng_payload *payload) |
bfb2ec6a SM |
103 | { |
104 | struct lttng_action_rotate_session *action_rotate_session; | |
105 | struct lttng_action_rotate_session_comm comm; | |
106 | size_t session_name_len; | |
107 | int ret; | |
108 | ||
109 | assert(action); | |
c0a66c84 | 110 | assert(payload); |
bfb2ec6a SM |
111 | |
112 | action_rotate_session = action_rotate_session_from_action(action); | |
113 | ||
114 | assert(action_rotate_session->session_name); | |
115 | ||
116 | DBG("Serializing rotate session action: session-name: %s", | |
117 | action_rotate_session->session_name); | |
118 | ||
119 | session_name_len = strlen(action_rotate_session->session_name) + 1; | |
120 | comm.session_name_len = session_name_len; | |
121 | ||
c0a66c84 JG |
122 | ret = lttng_dynamic_buffer_append( |
123 | &payload->buffer, &comm, sizeof(comm)); | |
bfb2ec6a SM |
124 | if (ret) { |
125 | ret = -1; | |
126 | goto end; | |
127 | } | |
128 | ||
c0a66c84 | 129 | ret = lttng_dynamic_buffer_append(&payload->buffer, |
bfb2ec6a SM |
130 | action_rotate_session->session_name, session_name_len); |
131 | if (ret) { | |
132 | ret = -1; | |
133 | goto end; | |
134 | } | |
135 | ||
c2c58434 JR |
136 | ret = lttng_firing_policy_serialize( |
137 | action_rotate_session->policy, payload); | |
138 | if (ret) { | |
139 | ret = -1; | |
140 | goto end; | |
141 | } | |
bfb2ec6a SM |
142 | end: |
143 | return ret; | |
144 | } | |
145 | ||
146 | static void lttng_action_rotate_session_destroy(struct lttng_action *action) | |
147 | { | |
148 | struct lttng_action_rotate_session *action_rotate_session; | |
149 | ||
150 | if (!action) { | |
151 | goto end; | |
152 | } | |
153 | ||
154 | action_rotate_session = action_rotate_session_from_action(action); | |
155 | ||
c2c58434 | 156 | lttng_firing_policy_destroy(action_rotate_session->policy); |
bfb2ec6a SM |
157 | free(action_rotate_session->session_name); |
158 | free(action_rotate_session); | |
159 | ||
160 | end: | |
161 | return; | |
162 | } | |
163 | ||
c0a66c84 JG |
164 | ssize_t lttng_action_rotate_session_create_from_payload( |
165 | struct lttng_payload_view *view, | |
bfb2ec6a SM |
166 | struct lttng_action **p_action) |
167 | { | |
c2c58434 | 168 | ssize_t consumed_len, ret; |
bfb2ec6a SM |
169 | const struct lttng_action_rotate_session_comm *comm; |
170 | const char *session_name; | |
171 | struct lttng_action *action; | |
172 | enum lttng_action_status status; | |
c2c58434 | 173 | struct lttng_firing_policy *policy = NULL; |
bfb2ec6a SM |
174 | |
175 | action = lttng_action_rotate_session_create(); | |
176 | if (!action) { | |
177 | consumed_len = -1; | |
178 | goto end; | |
179 | } | |
180 | ||
c0a66c84 | 181 | comm = (typeof(comm)) view->buffer.data; |
bfb2ec6a SM |
182 | session_name = (const char *) &comm->data; |
183 | ||
184 | if (!lttng_buffer_view_contains_string( | |
c0a66c84 | 185 | &view->buffer, session_name, comm->session_name_len)) { |
bfb2ec6a SM |
186 | consumed_len = -1; |
187 | goto end; | |
188 | } | |
c2c58434 JR |
189 | consumed_len = sizeof(*comm) + comm->session_name_len; |
190 | ||
191 | /* Firing policy. */ | |
192 | { | |
193 | struct lttng_payload_view policy_view = | |
194 | lttng_payload_view_from_view( | |
195 | view, consumed_len, -1); | |
196 | ret = lttng_firing_policy_create_from_payload( | |
197 | &policy_view, &policy); | |
198 | if (ret < 0) { | |
199 | consumed_len = -1; | |
200 | goto end; | |
201 | } | |
202 | consumed_len += ret; | |
203 | } | |
bfb2ec6a SM |
204 | |
205 | status = lttng_action_rotate_session_set_session_name( | |
206 | action, session_name); | |
207 | if (status != LTTNG_ACTION_STATUS_OK) { | |
208 | consumed_len = -1; | |
209 | goto end; | |
210 | } | |
211 | ||
c2c58434 JR |
212 | assert(policy); |
213 | status = lttng_action_rotate_session_set_firing_policy(action, policy); | |
214 | if (status != LTTNG_ACTION_STATUS_OK) { | |
215 | consumed_len = -1; | |
216 | goto end; | |
217 | } | |
218 | ||
bfb2ec6a SM |
219 | *p_action = action; |
220 | action = NULL; | |
221 | ||
222 | end: | |
c2c58434 | 223 | lttng_firing_policy_destroy(policy); |
bfb2ec6a SM |
224 | lttng_action_rotate_session_destroy(action); |
225 | ||
226 | return consumed_len; | |
227 | } | |
228 | ||
229 | struct lttng_action *lttng_action_rotate_session_create(void) | |
230 | { | |
c2c58434 JR |
231 | struct lttng_action *action = NULL; |
232 | struct lttng_firing_policy *policy = NULL; | |
233 | enum lttng_action_status status; | |
234 | ||
235 | /* Create a every N = 1 firing policy. */ | |
236 | policy = lttng_firing_policy_every_n_create(1); | |
237 | if (!policy) { | |
238 | goto end; | |
239 | } | |
bfb2ec6a SM |
240 | |
241 | action = zmalloc(sizeof(struct lttng_action_rotate_session)); | |
242 | if (!action) { | |
243 | goto end; | |
244 | } | |
245 | ||
246 | lttng_action_init(action, LTTNG_ACTION_TYPE_ROTATE_SESSION, | |
247 | lttng_action_rotate_session_validate, | |
248 | lttng_action_rotate_session_serialize, | |
249 | lttng_action_rotate_session_is_equal, | |
250 | lttng_action_rotate_session_destroy); | |
251 | ||
c2c58434 JR |
252 | status = lttng_action_rotate_session_set_firing_policy(action, policy); |
253 | if (status != LTTNG_ACTION_STATUS_OK) { | |
254 | free(action); | |
255 | action = NULL; | |
256 | goto end; | |
257 | } | |
258 | ||
bfb2ec6a | 259 | end: |
c2c58434 | 260 | lttng_firing_policy_destroy(policy); |
bfb2ec6a SM |
261 | return action; |
262 | } | |
263 | ||
264 | enum lttng_action_status lttng_action_rotate_session_set_session_name( | |
265 | struct lttng_action *action, const char *session_name) | |
266 | { | |
267 | struct lttng_action_rotate_session *action_rotate_session; | |
268 | enum lttng_action_status status; | |
269 | ||
270 | if (!action || !IS_ROTATE_SESSION_ACTION(action) || !session_name || | |
271 | strlen(session_name) == 0) { | |
272 | status = LTTNG_ACTION_STATUS_INVALID; | |
273 | goto end; | |
274 | } | |
275 | ||
276 | action_rotate_session = action_rotate_session_from_action(action); | |
277 | ||
278 | free(action_rotate_session->session_name); | |
279 | ||
280 | action_rotate_session->session_name = strdup(session_name); | |
281 | if (!action_rotate_session->session_name) { | |
282 | status = LTTNG_ACTION_STATUS_ERROR; | |
283 | goto end; | |
284 | } | |
285 | ||
286 | status = LTTNG_ACTION_STATUS_OK; | |
287 | end: | |
288 | return status; | |
289 | } | |
290 | ||
291 | enum lttng_action_status lttng_action_rotate_session_get_session_name( | |
292 | const struct lttng_action *action, const char **session_name) | |
293 | { | |
294 | const struct lttng_action_rotate_session *action_rotate_session; | |
295 | enum lttng_action_status status; | |
296 | ||
297 | if (!action || !IS_ROTATE_SESSION_ACTION(action) || !session_name) { | |
298 | status = LTTNG_ACTION_STATUS_INVALID; | |
299 | goto end; | |
300 | } | |
301 | ||
302 | action_rotate_session = action_rotate_session_from_action_const(action); | |
303 | ||
304 | *session_name = action_rotate_session->session_name; | |
305 | ||
306 | status = LTTNG_ACTION_STATUS_OK; | |
307 | end: | |
308 | return status; | |
309 | } | |
c2c58434 JR |
310 | |
311 | enum lttng_action_status lttng_action_rotate_session_set_firing_policy( | |
312 | struct lttng_action *action, | |
313 | const struct lttng_firing_policy *policy) | |
314 | { | |
315 | enum lttng_action_status status; | |
316 | struct lttng_action_rotate_session *rotate_session_action; | |
317 | struct lttng_firing_policy *copy = NULL; | |
318 | ||
319 | if (!action || !policy || !IS_ROTATE_SESSION_ACTION(action)) { | |
320 | status = LTTNG_ACTION_STATUS_INVALID; | |
321 | goto end; | |
322 | } | |
323 | ||
324 | copy = lttng_firing_policy_copy(policy); | |
325 | if (!copy) { | |
326 | status = LTTNG_ACTION_STATUS_ERROR; | |
327 | goto end; | |
328 | } | |
329 | ||
330 | rotate_session_action = action_rotate_session_from_action(action); | |
331 | ||
332 | /* Free the previous firing policy .*/ | |
333 | lttng_firing_policy_destroy(rotate_session_action->policy); | |
334 | ||
335 | /* Assign the policy. */ | |
336 | rotate_session_action->policy = copy; | |
337 | status = LTTNG_ACTION_STATUS_OK; | |
338 | copy = NULL; | |
339 | ||
340 | end: | |
341 | lttng_firing_policy_destroy(copy); | |
342 | return status; | |
343 | } | |
344 | ||
345 | enum lttng_action_status lttng_action_rotate_session_get_firing_policy( | |
346 | const struct lttng_action *action, | |
347 | const struct lttng_firing_policy **policy) | |
348 | { | |
349 | enum lttng_action_status status; | |
350 | const struct lttng_action_rotate_session *rotate_session_action; | |
351 | ||
352 | if (!action || !policy || !IS_ROTATE_SESSION_ACTION(action)) { | |
353 | status = LTTNG_ACTION_STATUS_INVALID; | |
354 | goto end; | |
355 | } | |
356 | ||
357 | rotate_session_action = action_rotate_session_from_action_const(action); | |
358 | ||
359 | *policy = rotate_session_action->policy; | |
360 | status = LTTNG_ACTION_STATUS_OK; | |
361 | end: | |
362 | return status; | |
363 | } |